92 lines
3.3 KiB
C
92 lines
3.3 KiB
C
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/*-
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* Copyright (c) 2014 M. Warner Losh. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/types.h>
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#include <arm/at91/at91reg.h>
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#include <arm/at91/at91_smc.h>
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#include <arm/at91/at91sam9260reg.h>
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/*
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* RD4HW()/WR4HW() read and write at91 hardware register space directly. They
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* serve the same purpose as the RD4()/WR4() idiom you see in many drivers,
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* except that those translate to bus_space calls, but in this code we need to
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* access some devices before bus_space is ready to use. Of course for this to
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* work the appropriate static device mappings need to be made in machdep.c.
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*/
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static inline uint32_t
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RD4HW(uint32_t devbase, uint32_t regoff)
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{
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return *(volatile uint32_t *)(AT91_BASE + devbase + regoff);
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}
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static inline void
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WR4HW(uint32_t devbase, uint32_t regoff, uint32_t val)
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{
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*(volatile uint32_t *)(AT91_BASE + devbase + regoff) = val;
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}
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void
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at91_smc_setup(int id, int cs, const struct at91_smc_init *smc)
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{
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// Need a generic way to get this address for all SoCs... Assume 9260 for now...
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uint32_t base = AT91SAM9260_SMC_BASE + SMC_CS_OFF(cs);
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WR4HW(base, SMC_SETUP, SMC_SETUP_NCS_RD_SETUP(smc->ncs_rd_setup) |
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SMC_SETUP_NRD_SETUP(smc->nrd_setup) |
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SMC_SETUP_NCS_WR_SETUP(smc->ncs_wr_setup) |
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SMC_SETUP_NWE_SETUP(smc->nwe_setup));
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WR4HW(base, SMC_PULSE, SMC_PULSE_NCS_RD_PULSE(smc->ncs_rd_pulse) |
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SMC_PULSE_NRD_PULSE(smc->nrd_pulse) |
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SMC_PULSE_NCS_WR_PULSE(smc->ncs_wr_pulse) |
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SMC_PULSE_NWE_PULSE(smc->nwe_pulse));
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WR4HW(base, SMC_CYCLE, SMC_CYCLE_NRD_CYCLE(smc->nrd_cycle) |
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SMC_CYCLE_NWE_CYCLE(smc->nwe_cycle));
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WR4HW(base, SMC_MODE, smc->mode | SMC_MODE_TDF_CYCLES(smc->tdf_cycles));
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}
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void
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at91_ebi_enable(int bank)
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{
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WR4HW(AT91SAM9260_MATRIX_BASE, AT91SAM9260_EBICSA, (1 << bank) |
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RD4HW(AT91SAM9260_MATRIX_BASE, AT91SAM9260_EBICSA));
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}
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void
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at91_ebi_disable(int bank)
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{
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WR4HW(AT91SAM9260_MATRIX_BASE, AT91SAM9260_EBICSA, ~(1 << bank) &
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RD4HW(AT91SAM9260_MATRIX_BASE, AT91SAM9260_EBICSA));
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}
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